Month: November 2022

Lin, You-Chen published the artcileConcise Synthesis and Antimicrobial Evaluation of the Guanidinium Alkaloid Batzelladine D: Development of a Stereodivergent Strategy, Name: (S)-2-Methylpropane-2-sulfinamide, the main research area is stereodivergent synthesis batzelladine D antimicrobial activity.

Herein, we describe a stereodivergent route to (±)-batzelladine D (2), (+)-batzelladine D (2), (-)-batzelladine D (2), and a series of stereochem. analogs and explore their antimicrobial activity for the first time. The concise synthetic approach enables access to the natural products in a sequence of 8-12 steps from readily available building blocks. Highlights of the synthetic strategy include gram-scale preparation of a late stage intermediate, pinpoint stereocontrol around the tricyclic skeleton, and a modular strategy that enables analog generation. A key bicyclic β-lactam intermediate not only serves as the key controlling element for pyrrolidine stereochem. but also serves as a preactivated coupling partner to install the ester side chain. The stereocontrolled synthesis allowed for the investigation of the antimicrobial activity of batzelladine D, demonstrating promising activity that is more potent for non-natural stereoisomers.

Journal of the American Chemical Society published new progress about Acinetobacter baumannii. 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Name: (S)-2-Methylpropane-2-sulfinamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Speak, Thomas H. published the artcileOH Kinetics with a Range of Nitrogen-Containing Compounds: N-Methylformamide, t-Butylamine, and N-Methyl-propane Diamine, Computed Properties of 123-39-7, the main research area is hydroxyl radical reaction kinetics methylformamide tert butylamine.

Emissions of amines and amides to the atm. are significant from both anthropogenic and natural sources, and amides can be formed as secondary pollutants. Relatively little kinetic data exist on overall rate coefficients with OH, the most important tropospheric oxidant, and even less on site-specific data which control the product distribution. Structure-activity relationships (SARs) can be used to estimate both quantities. Rate coefficients for the reaction of OH with t-butylamine (k1), N-methyl-1,3-propanediamine (k2), and N-methylformamide (k3) have been measured using laser flash photolysis coupled with laser-induced fluorescence. Proton-transfer-reaction mass spectrometry (PTR-MS) has been used to ensure the reliable introduction of these low-vapor pressure N-containing compounds and to give qual. information on products. Supporting ab initio calculations are presented for the t-butylamine system. The following rate coefficients have been determined: k1,298K= (1.66 ± 0.20) x 10-11 cm3 mol.-1 s-1, k(T)1 = 1.65 x 10-11 (T/300)-0.69 cm3 mol.-1 s-1, k2,293K = (7.09 ± 0.22) x 10-11 cm3 mol.-1 s-1, and k3,298K = (1.03 ± 0.23) x 10-11 cm3 mol.-1 s-1. For OH + t-butylamine, ab initio calculations predict that the fraction of N-H abstraction is 0.87. The dominance of this channel was qual. confirmed using end-product anal. The reaction of OH with N-methyl-1,3-propanediamine also had a neg. temperature dependence, but the reduction in the rate coefficient was complicated by reagent loss. The measured rate coefficient for reaction 3 is in good agreement with a recent relative rate study. The results of this work and the literature data are compared with the recent SAR estimates for the reaction of OH with reduced nitrogen compounds Although the SARs reproduce the overall rate coefficients for reactions, site-specific agreement with this work and other literature studies is less strong.

Journal of Physical Chemistry A published new progress about Environmental pollutants. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Computed Properties of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Ao, Xianyu published the artcileEnhanced Fields in Mirror-Backed Low-Index Dielectric Structures, Recommanded Product: N-Methylformamide, the main research area is field mirror backed dielec nanopillar array.

This Letter reports the localization of optical fields in dielec. nanopillar arrays on a metal film. Large-area arrays of tall (>450 nm) polymer pillars were patterned on an optically thick gold film by solvent-assisted nanoscale embossing. This hybrid dielec.-metal system supports two high-quality band-edge modes, with the mode at the wavelength closest to the array spacing concentrating electromagnetic field intensity at the tops of and extending beyond the nanopillars. Organic dye mols. mixed in the polymer matrix of the nanopillars showed enhanced radiative emission rates and narrow-band and unidirectional fluorescence emission. This hybrid platform offers prospects for strong near-field enhancements from low-index dielec. nanostructures.

ACS Photonics published new progress about Electric field (profile). 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Recommanded Product: N-Methylformamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Shendre, Sushant published the artcileUltrahigh-efficiency aqueous flat nanocrystals of CdSe/CdS@Cd1-xZnxS colloidal core/crown@alloyed-shell quantum wells, Quality Control of 123-39-7, the main research area is CdSe CdS CdZnS nanocrystal core crown shell quantum well.

Colloidal semiconductor nanoplatelets (NPLs) are highly promising luminescent materials owing to their exceptionally narrow emission spectra. While high-efficiency NPLs in non-polar organic media can be obtained readily, NPLs in aqueous media suffer from extremely low quantum yields (QYs), which completely undermines their potential, especially in biol. applications. Here, we show high-efficiency water-soluble CdSe/CdS@Cd1-xZnxS core/crown@shell NPLs formed by layer-by-layer grown and composition-tuned gradient Cd1-xZnxS shells on CdSe/CdS core/crown seeds. Such control of shell composition with monolayer precision and effective peripheral crown passivation, together with the compact capping d. of short 3-mercaptopropionic acid ligands, allow for QYs reaching 90% in water, accompanied by a significantly increased photoluminescence lifetime (∼35 ns), indicating the suppression of nonradiative channels in these NPLs. We also demonstrate the controlled attachment of these NPLs without stacking at the nanoscale by taking advantage of their 2D geometry and hydrophilicity. This is a significant step in achieving controlled assemblies and overcoming the stacking process, which otherwise undermines their film formation and performance in optoelectronic applications. Moreover, we show that the parallel orientation of such NPLs achieved by the controlled attachment enables directed emission perpendicular to the surface of the NPL films, which is highly advantageous for light extraction in light-emitting platforms.

Nanoscale published new progress about Colloidal semiconductors. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Quality Control of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Laurence, Christian published the artcileHydrogen-Bond Acceptance of Solvents: A 19F Solvatomagnetic β1 Database to Replace Solvatochromic and Solvatovibrational Scales, COA of Formula: C2H5NO, the main research area is solvent hydrogen bond acceptor solvatomagnetic scale database.

A variety of physicochem. properties and several hydrogen-bond donors have been used to define methods and to build scales aiming at measuring the hydrogen-bond acceptance of solvents. There is a great deal of confusion in these scales and methods. Solvatochromic, solvatocalorimetric, solvatovibrational, and 19F solvatomagnetic comparison methods are critically reviewed. Only two methods, the solvatomagnetic and the solvatocalorimetric ones, are able to yield reliable solvent hydrogen-bond acceptance scales. The solvatomagnetic β1 scale defined from the 19F chem. shift of 4-fluorophenol is extended to many solvents including ionic liquids and green solvents. The results for about 240 hydrogen-bond acceptor solvents are organized in a numerical β1 database. The comparison of β1 with solvatochromic scales highlights their shortcomings, in particular for the important class of amphiprotic solvents. Therefore, the use of the 19F solvatomagnetic comparison method and of the solvatomagnetic β1 scale is recommended in solvent effect studies.

Journal of Organic Chemistry published new progress about Basicity (hydrogen-bond). 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, COA of Formula: C2H5NO.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Quach, David published the artcileStrategic Design of Catalytic Lysine-Targeting Reversible Covalent BCR-ABL Inhibitors, HPLC of Formula: 292170-96-8, the main research area is BCR ABL inhibitor lysine drug design; cancer; covalent inhibitors; lysine; proteomics; reversibility.

Targeted covalent inhibitors have re-emerged as validated drugs to overcome acquired resistance in cancer treatment. Herein, by using a carbonyl boronic acid (CBA) warhead, we report the structure-based design of BCR-ABL inhibitors via reversible covalent targeting of the catalytic lysine with improved potency against both wild-type and mutant ABL kinases, especially ABLT315I bearing the gatekeeper residue mutation. We show the evolutionarily conserved lysine can be targeted selectively, and the selectivity depends largely on mol. recognition of the non-covalent pharmacophore in this class of inhibitors, probably due to the moderate reactivity of the warhead. We report the first co-crystal structures of covalent inhibitor-ABL kinase domain complexes, providing insights into the interaction of this warhead with the catalytic lysine. We also employed label-free mass spectrometry to evaluate off-targets of our compounds at proteome-wide level in different mammalian cells.

Angewandte Chemie, International Edition published new progress about Antiproliferative agents. 292170-96-8 belongs to class amides-buliding-blocks, name is 5-Bromo-N,N-dimethylnicotinamide, and the molecular formula is C8H9BrN2O, HPLC of Formula: 292170-96-8.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Zhou, Shengchao published the artcileInsights into the Mechanism of Thiol-Triggered COS/H2S Release from N-Dithiasuccinoyl Amines, Synthetic Route of 123-39-7, the main research area is antiinflammatory dithiasuccinoyl amine derivative preparation thiol hydrogen sulfide.

The hydrolysis of carbonyl sulfide (COS) to form H2S by carbonic anhydrase has been demonstrated to be a viable strategy to deliver H2S in a biol. system. Herein, we describe N-dithiasuccinoyl amines as thiol-triggered COS/H2S donors. Notably, thiol species especially GSH and homocysteine can trigger the release of both COS and H2S directly from several specific analogs via an unexpected mechanism. Importantly, two representative analogs Dts-1 and Dts-5 show intracellular H2S release, and Dts-1 imparts potent anti-inflammatory effects in LPS-challenged microglia cells. In conclusion, N-dithiasuccinoyl amine could serve as promising COS/H2S donors for either H2S biol. studies or H2S-based therapeutics development.

Journal of Organic Chemistry published new progress about Anti-inflammatory agents. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Synthetic Route of 123-39-7.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Raubo, Piotr published the artcileThe discovery and evaluation of 3-amino-2(1H)-pyrazinones as a novel series of selective p38α MAP kinase inhibitors, Application of (S)-2-Methylpropane-2-sulfinamide, the main research area is amino pyrazinone derivative preparation p38MAP kinase inhibitor inhalation structure; AZD6703; AZD7624; COPD; Inflammation; Kinases; P38α.

The discovery and optimization of a novel series of potent and selective p38α inhibitors is described. Evaluating the structure-activity relationship of an aminoalkyl substituent at the 3 position of the 2(1H)-pyrazinone core, p38α potency was increased 20000-fold. The most advanced compound (25) demonstrated excellent in vivo properties suitable for an inhaled route of administration.

Bioorganic & Medicinal Chemistry Letters published new progress about Anti-inflammatory agents. 343338-28-3 belongs to class amides-buliding-blocks, name is (S)-2-Methylpropane-2-sulfinamide, and the molecular formula is C4H11NOS, Application of (S)-2-Methylpropane-2-sulfinamide.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Mayhoub, Abdelrahman S. published the artcileOptimization of thiazole analogues of resveratrol for induction of NAD(P)H:quinone reductase 1 (QR1), Quality Control of 1208077-46-6, the main research area is resveratrol thiazole analog preparation NADPH quinone reductase structure cancer.

NAD(P)H:quinone reductase 1 (QR1) belongs to a class of enzymes called cytoprotective enzymes. It exhibits its cancer protective activity mainly by inhibiting the formation of intracellular semiquinone radicals, and by generating α-tocopherolhydroquinone, which acts as a free radical scavenger. It is therefore believed that QR1 inducers can act as cancer chemopreventive agents. Resveratrol (1) is a naturally occurring stilbene derivative that requires a concentration of 21 μM to double QR1 activity (CD = 21 μM). The stilbene double bond of resveratrol was replaced with a thiadiazole ring and the phenols were eliminated to provide a more potent and selective derivative 2 (CD = 2.1 μM). Optimizing the substitution pattern of the two Ph rings and the central heterocyclic linker led to a highly potent and selective QR1 inducer 9o with a CD value of 0.087 μM.

Bioorganic & Medicinal Chemistry published new progress about Anti-inflammatory agents. 1208077-46-6 belongs to class amides-buliding-blocks, name is 4-Butylthiobenzamide, and the molecular formula is C11H15NS, Quality Control of 1208077-46-6.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Wu, Long-Fei published the artcilepH-Dependent peptide bond formation by the selective coupling of α-amino acids in water, Formula: C2H5NO, the main research area is peptide one pot synthesis prebiotic evolution life origin; amino acid peptide alanine coupling prebiotic amine methyl isonitrile; carboxylic acid anhydride intermediate amide bond formation; methyl isonitrile mediated reaction mechanism peptide elongation coupling.

A novel mechanism enabling selective peptide elongation by coupling α-amino acids over other potentially competing prebiotic amines under acidic aqueous condition is suggested. It proceeds via the generation of a carboxylic acid anhydride intermediate with subsequent intramol. formation of the amide bond.

Chemical Communications (Cambridge, United Kingdom) published new progress about Amide group (amide bond). 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Formula: C2H5NO.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics